Due to the Tohoku-Chihou-Taiheiyou-Oki Earthquake which occurred on March
11, 2011, TEPCO's facilities including our nuclear power stations have
been severely damaged. We deeply apologize for the anxiety and
inconvenience caused.
With regard to the accident at Fukushima Daiichi Nuclear Power Station,
on April 17, 2011, we have compiled the roadmap towards restoration from
the accident and on July 19 we accomplished the Step1 target "Radiation
dose is in steady decline". Then on December 16 we confirmed the
accomplishment of the Step 2 target "Release of radioactive materials is
under control and radiation doses are being significantly held down".
In addition, on December 21, 2011, we have compiled the "Mid-to-long-Term
Roadmap toward the Decommissioning of Fukushima Daiichi Nuclear Power
Units 1-4, TEPCO".
In addition to the maintenance of the plant's stable condition, we will
implement Mid-to-Long Term countermeasures towards the decommissioning of
Fukushima Daiichi Nuclear Power Units 1-4 to enable evacuees to return to
their homes as soon as possible and reduce the anxiety of the people in
Fukushima and the whole nation as soon as possible. 
 
Below is the status of TEPCO's major facilities. 
 
* The updates are underlined.

[Nuclear Power Station] 
· Fukushima Daiichi Nuclear Power Station: Unit 1 to 3: shut down due to
  the earthquake:
   (Units 4 to 6: outage due to regular inspections before the earthquake)

 - With regard to the thermometer placed at the lower part of RPV (top of
   the lower head 135°)  whose trend were different  while others showed
   the increasing trend after we decreased the water injection rate to
   the Unit 2 Reactor from the feed water system on February 22, we
   reported to Nuclear and Industrial Safety Agency of Ministry of
   Economy, Trade and Industry on March 1. We will continue monitoring
   this thermometer. 
   · At 11:00 am on March 15, the temperature of the lower part of the RPV 
     (top of the lower head 135°) : approx. 40.4 °C 
   · At 11:00 am on March 15, the temperature of the lower part of the RPV 
     (top of the lower head 270°) : approx. 40.9 °C (reference)

 - On March 14, 2012, we conducted sampling of the gas of the PCV gas 
   management system.  As a result of the analysis, we confirmed that at 
   the entrance of the system Xenon 135 was below detection limit (9.6× 
   10-2Bq/cm3), and below the re-criticality criterion which is 1Bq/cm3.

 - The Cesium adsorption apparatus was stopped to implement a work for 
   improving reliability of the water treatment system.  At 1:08 pm on 
   March 15, 2012, we made a trial run of the added oil separator treated 
   water transfer pump of the Cesium adsorption apparatus.  At 2:40 pm on 
   the same day, we confirmed that the flow rate had steadied (19.8m3/h), 
   the water treatment operation was stable, and that there were no 
   operational problems.

· Fukushima Daini Nuclear Power Station: 
   Units 1 to 4: shutdown due to the earthquake

· Kashiwazaki Kariwa Nuclear Power Station:
  Units 6: under normal operation
  (Units 1 to 5 and 7: outage due to regular inspections)

[Thermal Power Station] 
· Power supply has returned to normal and the facilities damaged by the
  earthquake are now being handled in a timely manner.

[Hydro Power Station] 
· Power supply has returned to normal and the facilities damaged by the
  earthquake are now being handled in a timely manner.

[Impacts on Transmission Facilities] 
· Power supply has returned to normal and the facilities damaged by the
  earthquake are now being handled in a timely manner.

[Impacts on Power Supply and Demand Balance] 
We expect to maintain stable power supply in March.
Daily supply and demand balance is announced at our "TEPCO Electricity
Forecast".
 

Appendix: Past Progress (As of 3:00 pm, on March 15, 2012) (PDF 713KB) 
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB) 
 
* Revised past progress